tranmerc.h
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上传用户:oybseng
上传日期:2015-04-27
资源大小:7831k
文件大小:9k
源码类别:
GDI/图象编程
开发平台:
Visual C++
- #ifndef TRANMERC_H
- #define TRANMERC_H
- /***************************************************************************/
- /* RSC IDENTIFIER: TRANSVERSE MERCATOR
- *
- * ABSTRACT
- *
- * This component provides conversions between Geodetic coordinates
- * (latitude and longitude) and Transverse Mercator projection coordinates
- * (easting and northing).
- *
- * ERROR HANDLING
- *
- * This component checks parameters for valid values. If an invalid value
- * is found the error code is combined with the current error code using
- * the bitwise or. This combining allows multiple error codes to be
- * returned. The possible error codes are:
- *
- * TRANMERC_NO_ERROR : No errors occurred in function
- * TRANMERC_LAT_ERROR : Latitude outside of valid range
- * (-90 to 90 degrees)
- * TRANMERC_LON_ERROR : Longitude outside of valid range
- * (-180 to 360 degrees, and within
- * +/-90 of Central Meridian)
- * TRANMERC_EASTING_ERROR : Easting outside of valid range
- * (depending on ellipsoid and
- * projection parameters)
- * TRANMERC_NORTHING_ERROR : Northing outside of valid range
- * (depending on ellipsoid and
- * projection parameters)
- * TRANMERC_ORIGIN_LAT_ERROR : Origin latitude outside of valid range
- * (-90 to 90 degrees)
- * TRANMERC_CENT_MER_ERROR : Central meridian outside of valid range
- * (-180 to 360 degrees)
- * TRANMERC_A_ERROR : Semi-major axis less than or equal to zero
- * TRANMERC_INV_F_ERROR : Inverse flattening outside of valid range
- * (250 to 350)
- * TRANMERC_SCALE_FACTOR_ERROR : Scale factor outside of valid
- * range (0.3 to 3.0)
- * TM_LON_WARNING : Distortion will result if longitude is more
- * than 9 degrees from the Central Meridian
- *
- * REUSE NOTES
- *
- * TRANSVERSE MERCATOR is intended for reuse by any application that
- * performs a Transverse Mercator projection or its inverse.
- *
- * REFERENCES
- *
- * Further information on TRANSVERSE MERCATOR can be found in the
- * Reuse Manual.
- *
- * TRANSVERSE MERCATOR originated from :
- * U.S. Army Topographic Engineering Center
- * Geospatial Information Division
- * 7701 Telegraph Road
- * Alexandria, VA 22310-3864
- *
- * LICENSES
- *
- * None apply to this component.
- *
- * RESTRICTIONS
- *
- * TRANSVERSE MERCATOR has no restrictions.
- *
- * ENVIRONMENT
- *
- * TRANSVERSE MERCATOR was tested and certified in the following
- * environments:
- *
- * 1. Solaris 2.5 with GCC, version 2.8.1
- * 2. Windows 95 with MS Visual C++, version 6
- *
- * MODIFICATIONS
- *
- * Date Description
- * ---- -----------
- * 10-02-97 Original Code
- * 03-02-97 Re-engineered Code
- *
- */
- /***************************************************************************/
- /*
- * DEFINES
- */
- #define TRANMERC_NO_ERROR 0x0000
- #define TRANMERC_LAT_ERROR 0x0001
- #define TRANMERC_LON_ERROR 0x0002
- #define TRANMERC_EASTING_ERROR 0x0004
- #define TRANMERC_NORTHING_ERROR 0x0008
- #define TRANMERC_ORIGIN_LAT_ERROR 0x0010
- #define TRANMERC_CENT_MER_ERROR 0x0020
- #define TRANMERC_A_ERROR 0x0040
- #define TRANMERC_INV_F_ERROR 0x0080
- #define TRANMERC_SCALE_FACTOR_ERROR 0x0100
- #define TRANMERC_LON_WARNING 0x0200
- /***************************************************************************/
- /*
- * FUNCTION PROTOTYPES
- * for TRANMERC.C
- */
- /* ensure proper linkage to c++ programs */
- #ifdef __cplusplus
- extern "C" {
- #endif
- long Set_Transverse_Mercator_Parameters(double a,
- double f,
- double Origin_Latitude,
- double Central_Meridian,
- double False_Easting,
- double False_Northing,
- double Scale_Factor);
- /*
- * The function Set_Tranverse_Mercator_Parameters receives the ellipsoid
- * parameters and Tranverse Mercator projection parameters as inputs, and
- * sets the corresponding state variables. If any errors occur, the error
- * code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is
- * returned.
- *
- * a : Semi-major axis of ellipsoid, in meters (input)
- * f : Flattening of ellipsoid (input)
- * Origin_Latitude : Latitude in radians at the origin of the (input)
- * projection
- * Central_Meridian : Longitude in radians at the center of the (input)
- * projection
- * False_Easting : Easting/X at the center of the projection (input)
- * False_Northing : Northing/Y at the center of the projection (input)
- * Scale_Factor : Projection scale factor (input)
- */
- void Get_Transverse_Mercator_Parameters(double *a,
- double *f,
- double *Origin_Latitude,
- double *Central_Meridian,
- double *False_Easting,
- double *False_Northing,
- double *Scale_Factor);
- /*
- * The function Get_Transverse_Mercator_Parameters returns the current
- * ellipsoid and Transverse Mercator projection parameters.
- *
- * a : Semi-major axis of ellipsoid, in meters (output)
- * f : Flattening of ellipsoid (output)
- * Origin_Latitude : Latitude in radians at the origin of the (output)
- * projection
- * Central_Meridian : Longitude in radians at the center of the (output)
- * projection
- * False_Easting : Easting/X at the center of the projection (output)
- * False_Northing : Northing/Y at the center of the projection (output)
- * Scale_Factor : Projection scale factor (output)
- */
- long Convert_Geodetic_To_Transverse_Mercator (double Latitude,
- double Longitude,
- double *Easting,
- double *Northing);
- /*
- * The function Convert_Geodetic_To_Transverse_Mercator converts geodetic
- * (latitude and longitude) coordinates to Transverse Mercator projection
- * (easting and northing) coordinates, according to the current ellipsoid
- * and Transverse Mercator projection coordinates. If any errors occur, the
- * error code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is
- * returned.
- *
- * Latitude : Latitude in radians (input)
- * Longitude : Longitude in radians (input)
- * Easting : Easting/X in meters (output)
- * Northing : Northing/Y in meters (output)
- */
- long Convert_Transverse_Mercator_To_Geodetic (double Easting,
- double Northing,
- double *Latitude,
- double *Longitude);
- /*
- * The function Convert_Transverse_Mercator_To_Geodetic converts Transverse
- * Mercator projection (easting and northing) coordinates to geodetic
- * (latitude and longitude) coordinates, according to the current ellipsoid
- * and Transverse Mercator projection parameters. If any errors occur, the
- * error code(s) are returned by the function, otherwise TRANMERC_NO_ERROR is
- * returned.
- *
- * Easting : Easting/X in meters (input)
- * Northing : Northing/Y in meters (input)
- * Latitude : Latitude in radians (output)
- * Longitude : Longitude in radians (output)
- */
- #ifdef __cplusplus
- }
- #endif
- #endif /* TRANMERC_H */